Common/DocumentResultList: Add caching

GUIs.Common/DocumentResultList/Cache.vb

@@ -1,8 +1,11 @@
-Imports DigitalData.Modules.EDMI.API.Client
+Imports DigitalData.Modules.Base
+Imports DigitalData.Modules.EDMI.API.Client
+Imports DigitalData.Modules.Logging
 
 Namespace DocumentResultList
 
     Public Class Cache
+        Inherits BaseClass
         Implements ICollection(Of Document)
 
         Private Const _DefaultCapacity As Long = 1000
@@ -17,16 +20,20 @@ Namespace DocumentResultList
         Private ReadOnly Index As New Dictionary(Of String, LinkedListNode(Of Document))
         Private ReadOnly Lock As New Object
 
-        Public Sub New()
+        Public Sub New(pLogConfig As LogConfig)
-            Me.New(_DefaultCapacity)
+            Me.New(pLogConfig, _DefaultCapacity)
         End Sub
 
-        Public Sub New(capacity As Long)
+        Public Sub New(pLogConfig As LogConfig, pCapacity As Long)
-            If capacity < 0 Then
+            MyBase.New(pLogConfig)
+
+            If pCapacity < 0 Then
                 Throw New InvalidOperationException("DocumentResultCache capacity must be positive.")
             End If
 
-            Me.Capacity = capacity
+            Logger.Debug("Initializing DocumentResultCache with capacity of [{0}] bytes.", pCapacity)
+
+            Me.Capacity = pCapacity
         End Sub
 
         Public Event DiscardingOldestItem As EventHandler
@@ -40,6 +47,8 @@ Namespace DocumentResultList
         End Property
 
         Public Sub Add(pItem As Document) Implements ICollection(Of Document).Add
+            Logger.Debug("Adding document [{0}].", pItem.Id)
+
             SyncLock Lock
                 If Index.ContainsKey(pItem.Id) Then
                     List.Remove(Index(pItem.Id))
@@ -64,6 +73,10 @@ Namespace DocumentResultList
             Return Index.ContainsKey(pItem.Id)
         End Function
 
+        Public Function Contains(pDocumentId As Long) As Boolean
+            Return Index.ContainsKey(pDocumentId)
+        End Function
+
         Public Sub CopyTo(pArray As Document(), pIndex As Integer) Implements ICollection(Of Document).CopyTo
             SyncLock Lock
                 For Each item As Document In Me
@@ -86,6 +99,8 @@ Namespace DocumentResultList
         End Property
 
         Public Function Remove(pItem As Document) As Boolean Implements ICollection(Of Document).Remove
+            Logger.Debug("Removing document [{0}].", pItem.Id)
+
             SyncLock Lock
 
                 If Index.ContainsKey(pItem.Id) Then

GUIs.Common/DocumentResultList/Loader.vb

@@ -6,6 +6,7 @@ Imports DigitalData.Modules.Logging
 Imports DigitalData.Modules.Base.IDB
 Imports DigitalData.Modules.ZooFlow.Constants
 Imports DigitalData.Modules.Base
+Imports DigitalData.Modules.ZooFlow
 
 Namespace DocumentResultList
 
@@ -14,29 +15,50 @@ Namespace DocumentResultList
 
         Private ReadOnly Client As Client
         Private ReadOnly Mode As OperationMode
-        Private ReadOnly User As DigitalData.Modules.ZooFlow.State.UserState
+        Private ReadOnly User As State.UserState
 
-        Public Sub New(pLogConfig As LogConfig, pMode As OperationMode, pClient As Client, pUser As DigitalData.Modules.ZooFlow.State.UserState)
+        Private ReadOnly Cache As Cache
+
+        Public Sub New(pLogConfig As LogConfig, pMode As OperationMode, pClient As Client, pUser As State.UserState)
             MyBase.New(pLogConfig)
             Client = pClient
             Mode = pMode
             User = pUser
+
+            ' Set up cache with capacity of 100 MB
+            Cache = New Cache(104_900_000)
         End Sub
 
-        Public Function Load(pObjectId As Long, pFullPath As String) As Document
+        Public Sub Invalidate(pDocument As Document)
+            Cache.Remove(pDocument)
+        End Sub
+
+        Public Function Load(pObjectId As Long, pFullPath As String, Optional pForce As Boolean = False) As Document
+            Dim oDocument As Document = Nothing
+
+            If Cache.Contains(pObjectId) And pForce = False Then
+                Return Cache.Where(Function(doc) doc.Id = pObjectId).Single()
+            End If
+
             Select Case Mode
                 Case OperationMode.NoAppServer
-                    Return Load_FromWindream(pObjectId, pFullPath)
+                    oDocument = Load_FromWindream(pObjectId, pFullPath)
 
                 Case OperationMode.WithAppServer
-                    Return Load_FromIDB(pObjectId)
+                    oDocument = Load_FromIDB(pObjectId)
 
                 Case OperationMode.ZooFlow
-                    Return Load_FromZooflow(pObjectId)
+                    oDocument = Load_FromZooflow(pObjectId)
 
                 Case Else
-                    Return Nothing
+                    oDocument = Nothing
             End Select
+
+            If oDocument IsNot Nothing Then
+                Cache.Add(oDocument)
+            End If
+
+            Return oDocument
         End Function
 
         Private Function Load_FromWindream(pObjectId As Long, pFullPath As String) As Document

GUIs.Common/frmDocumentResultList.vb

@@ -50,7 +50,6 @@ Public Class frmDocumentResultList
     Private ReadOnly Filesystem As Modules.Filesystem.File
     Private ReadOnly GridBuilder As GridBuilder
     Private ReadOnly FileEx As Modules.Windows.File
-    Private ReadOnly Cache As New DocumentResultList.Cache(50000000)
 
     Private ReadOnly Helpers As DocumentResultList.Helpers
     Private ReadOnly Params As DocumentResultList.Params
@@ -322,6 +321,7 @@ Public Class frmDocumentResultList
             .Language = Environment.User.Language,
             .Username = Environment.User.UserName
         })
+        Documentloader.Invalidate(pFile.Document)
 
         If IsNothing(oObjectId) Then
             MsgBox($"Beim Speichern der Datei '{oDisplayName}' Fehler ist ein Fehler aufgetreten!", MsgBoxStyle.Critical, Text)